Postfix and Servers with invalid Helo
I like to keep higher than “normal” security on our email servers. One such setting in Postfix is: smtpd_helo_required = yes Along with this setting enabled, you need to specify…
Providing Email client autoconfiguration information
This is a re-post of the information from the moens.ch blog (which no longer exists) pulled from archive.org. Part of a discussion on Stack Overflow. I have not personally validated…
Cars and Batteries and Terminals Oh My, is it really red first?
Proper connection order first, details below. For JUMP STARTING with 2 vehicles: Red jumper to positive (red +) of dead battery. Red jumper to positive (red +) of charged battery.…
Thunderbird or Outlook Won’t Save Sent Messages (imap/dovecot)
You’re getting an error that Outlook or Thunderbird cannot save to the sent folder and you’re connected to an imap server running dovecot. You’re also seeing Maximum Number of User+IP…
Roundcube Auth Fail with ISPConfig3 and Dovecot
After an upgrade of ISPconfig to the latest version, I told ISPConfig to “reconfigure” services. Roundcube started these entries in the /usr/share/roundcubemail/logs/imap.log: [19-Dec-2021 23:26:53 +0000]: <21grgvah> [A61A] S: A0001 NO…